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s390/mm: add support for 2GB hugepages

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This adds support for 2GB hugetlbfs pages on s390.

Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Gerald Schaefer
2016-07-04 14:47:01 +02:00
committed by Martin Schwidefsky
parent 46210c440c
commit d08de8e2d8
8 changed files with 232 additions and 63 deletions
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5
arch/s390/include/asm/hugetlb.h
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@@ -41,7 +41,10 @@ static inline int prepare_hugepage_range(struct file *file,
static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
pte_t *ptep)
{
pte_val(*ptep) = _SEGMENT_ENTRY_EMPTY;
if ((pte_val(*ptep) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R3)
pte_val(*ptep) = _REGION3_ENTRY_EMPTY;
else
pte_val(*ptep) = _SEGMENT_ENTRY_EMPTY;
}
static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,